Keith Lysiak wrote:
>I am looking for information from anyone that has explicitly
>modeled coax cable (air dielectric) successfully. I am looking for
>suggestions for modeling in order to get good impedance match.
Although I haven't done it myself, I read somewhere how to do it:
1. use a single wire to model the outside (shield) conductor of
the coax; and,
2. connect an ideal-transmission-line (two-port, four-wire
connection) to the places where the ends of the coax connect.
The single-wire conductor couples to the fields in NEC. The
ideal-transmission-line model is invisible to the fields; it affects
only the voltages & currents at its ends.
Received on Thu Sep 25 1997 - 10:38:05 EDT
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